package com.itheima.service;

import com.itheima.pojo.Member;

import java.util.List;

/**
 * @author FCJ
 * @date 2020-01-10 10:23
 */
public interface MemberService {
    //根据电话号码查询会员
    Member findByTelephone(String telephone);

    //添加会员
    void add(Member member);
//根据月份查询会员数量
    List<Integer> findMemberCountByMonths(List<String> months);
}
